Dimenhydrinate is used to prevent and treat nausea, vomiting, and dizziness caused by motion sickness. Dimenhydrinate is in a class of medications called antihistamines. It works by preventing problems with body balance.
Dimenhydrinate comes as a tablet and chewable tablet to take by mouth with or without food. To prevent motion sickness, the first dose should be taken 30 minutes to 1 hour before you travel or begin motion activity. Adults and children older than age 12 may usually take dimenhydrinate every 4 to 6 hours as needed to prevent or treat motion sickness. Children under age 12 may usually be given dimenhydrinate every 6 to 8 hours as needed to prevent or treat motion sickness. Follow the directions on the package carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take dimenhydrinate exactly as directed. Do not take more or less of it or take it more often than directed by the package label.
Do not give dimenhydrinate to children younger than 2 years of age unless your doctor has told you to do so.
Dimenhydrinate is also sometimes used to treat Meniere's disease (condition of the inner ear which causes extreme dizziness, loss of balance, ringing in the ears, and hearing loss) and other inner ear problems. Talk to your doctor about the risks of using this medication for your condition.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
Unless your doctor tells you otherwise, continue your normal diet.
This medication is usually taken as needed. If your doctor has told you to take dimenhydrinate regularly, take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
excitement or hyperactivity (especially in children)
new or worsening dizziness
ringing in the ears
dry mouth, nose, or throat
problems with coordination
fast, pounding, or irregular heartbeat
Dimenhydrinate may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
large pupils (black circles in the centers of the eyes)
drowsiness or sleepiness
excitation or hyperactivity
hallucinations (seeing things or hearing voices that do not exist)
difficulty understanding reality
difficulty speaking or swallowing
unresponsiveness or coma (loss of consciousness for a period of time)
Ask your pharmacist any questions you have about dimenhydrinate.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.
Last Reviewed - 09/01/2010
AHFS® Consumer Medication Information. © Copyright, 2015. The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.